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发明名称
Improvements in or relating to the manufacture of metal tubes and tubular articles
摘要
申请公布号
GB521119(A)
申请公布日期
1940.05.13
申请号
GB19380032418
申请日期
1938.11.08
申请人
WELLMAN SEAVER ROLLING MILL COMPANY LIMITED;JAMES RAYMOND HOWARD
发明人
分类号
B21C33/00
主分类号
B21C33/00
代理机构
代理人
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